4MM CS X 50MM ID BLACK BUNA 70D

H4X50 is a black Buna-N (Nitrile) 70 Shore A O-Ring with an inside diameter of 50 mm (1.969 in), a cross section of 4 mm (0.157 in), and an outside diameter of 58 mm (2.28 in). In service, this o-ring provides a reliable static or dynamic seal by deforming into its gland under assembly load.

The compound resists greases and lubricants, hydraulic fluids, and many alcohols. Buna-N (Nitrile) is widely chosen for low compression set under sustained load, reliable performance in both static and dynamic service. Rated temperature range runs from -40°F (-40°C) to 250°F (121.1°C) in continuous service. It is not the right choice where automotive brake fluid or strong acids are present.

Maintenance and OEM teams specify it across fluid power, general industrial maintenance, and automotive.

H4X50 ships individually. Unit weight is approximately 2.59 g. Confirm chemical compatibility, pressure and temperature against your own application requirements before installing.